This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Influence of Suspension Kinematics and Damper Asymmetry on the Dynamic Responses of a Vehicle under Bump and Pothole Excitations
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 12, 2010 by SAE International in United States
Annotation ability available
Automotive suspensions invariably exhibit asymmetric damping properties in compression and rebound, which is partly attributed to asymmetric damping and in-part to the suspension linkage kinematics together with tire lateral compliance. Although automotive suspensions have invariably employed asymmetric damping, the design guidelines and particular rationale for such asymmetry has not been explicitly defined. The influences of damper asymmetry together with the suspension kinematics and tire lateral compliance on the dynamic responses of a vehicle are investigated analytically under bump and pothole excitations, and the results are interpreted in view of potential design guidance. A quarter-car kineto-dynamic model of the road vehicle employing a double wishbone type suspension comprising a strut with linear spring and multiphase asymmetric damper is formulated for the analyses. The simulation results revealed conflicting sprung mass acceleration responses under idealized bump and pothole road inputs. The results attained from a sensitivity analysis suggested significant influences of damper asymmetry, and the compression and rebound reduction factors corresponding to higher strut speeds on the dynamic responses. A composite performance index comprising the ride comfort, rattle space and tire road holding properties of the vehicle is formulated to seek optimal damping asymmetry. The optimal suspension damping parameters derived through minimization of the composite index function revealed considerable potential for improved ride responses under the bump and pothole excitations.
|Technical Paper||Measuring and Modeling Suspensions of Passenger Vehicles|
|Technical Paper||Multi-Objective Optimization to Improve SUV Ride Performances Using MSC.ADAMS and Mode Frontier|
|Technical Paper||Pickups Vehicle Dynamics: Ride and Skate|
CitationBalike, K., Rakheja, S., and Stiharu, I., "Influence of Suspension Kinematics and Damper Asymmetry on the Dynamic Responses of a Vehicle under Bump and Pothole Excitations," SAE Technical Paper 2010-01-1135, 2010, https://doi.org/10.4271/2010-01-1135.
- Fan, Y. and Anderson, R.J., “Dynamic Testing and Modelling of a Bus Shock Absorber,” SAE Technical Paper 902282, 1990.
- Duym S, Stiens R and Rebrouck K, (1997), “Evaluation of Shock Absorber Models”, Vehicle System Dynamics, 27, pp 109-127.
- Basso R, (1998), “Experimental Characterization of Damping Force in Shock Absorber with Constant Velocity Excitation”, Vehicle System Dynamics, 30, pp 431-442.
- Gacka, S.P. and Doherty, C.G., “Design Analysis and Testing of Dampers for a Formula SAE Race Car,” SAE Technical Paper 2006-01-3641, 2006.
- Dixon, J.C., “Shock Absorber Handbook,” SAE International, Warrendale, PA, ISBN 978-0-7680-1843-1, 2007.
- Gillespie, T.D., “Fundamentals of Vehicle Dynamics,” SAE International, Warrendale, PA, ISBN 978-1-56091-199-9, 1992.
- Verros G, Natsivas S, and Stepan G, (2000), “Control and Dynamics of Quarter-Car Models with Dual-rate Damping”, Journal of Vibration and Control, 6, pp 1045-1063.
- Simms, A. and Crolla, D., “The Influence of Damper Properties on Vehicle Dynamic Behavior,” SAE Technical Paper 2002-01-0319, 2002.
- Balike K P, Rakheja S and Stiharu I, (2009), “A comprehensive Quarter-car Model for Kinematic and Dynamic Analysis of Suspension”, ASME IMECE-2009, Florida, USA.
- Fukushima N, Hidaka K and Iwata K, (1983), “Optimum Characteristics of Automotive Shock Absorbers Under Driving Conditions and Road Surfaces”, Int. J. of Vehicle Design, 4(5), pp 463-473.
- Warner, B. and Rakheja, S., “An Investigation of the Influence of High Performance Dampers on the Suspension Performance of a Quarter Vehicle,” SAE Technical Paper 962552, 1996.
- Rajalingham C and Rakheja S, (2003), “Influence of Suspension Damper Asymmetry on Vehicle Vibration Response to Ground Excitation”, Journal of Sound and Vibration, 266, pp 1117-1129.
- Verros G, Natsiavas S and Papadimitriou C, (2005), “Design Optimization of Quarter-car Models with Passive and Semi-active Suspensions under Random Road Excitation”, Journal of Vibration and Control, 11pp 581-606.
- Eslaminasab N, (2007), “Development of a Semi-active Intelligent Suspension System for Heavy Vehicles”, PhD Thesis, University of Waterloo, Canada.
- Calvo J A, Lopez-Boada B, San Roman J L and Gauchia A, (2009), “Influence of a Shock Absorber Model on a Vehicle Dynamic Simulation”, Proc. IMechE Part D: J. Automobile Engineering, 223, pp 189-202.
- Rakheja S, and Sankar S, (1985), “Vibration and Shock Isolation Performance of a Semi Active “on-off” Damper”, Transactions of ASME, Journal of Vibration, Acoustics, Stress, and Reliability in Design, 107, pp 398-403.
- Matlab Product Help, MathWorks Inc.